Verbatim 400GB USB 2.0 Portable Hard Drive - USB 2.0 / USB 1.1 port
HD that draws its power from the USB port.
Use Code MVC15 to get £15 off your first order.
You could also get a Verbatim 1.5TB Desktop USB2.0 Hard Disk Drive for £78 using the same code which seems a good deal.
the £15 can be used on anything on the site.